MRF49XA-I/ST Microchip Technology, MRF49XA-I/ST Datasheet - Page 69

• Manufacturer Part Number: MRF49XA-I/ST
• Description: IC RF TXRX 433/868/915 16-TSSOP
• Manufacturer: Microchip Technology

Specifications of MRF49XA-I/ST

• Package / Case: 16-TSSOP
• Frequency: 433MHz, 868MHz, 915MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FHSS, FSK
• Applications: Home / Industrial Automation, Remote Access, Security Alarms
• Power - Output: 7dbm
• Sensitivity: -110dBm
• Voltage - Supply: 2.2 V ~ 3.8 V
• Current - Receiving: 11mA
• Current - Transmitting: 15mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Number Of Receivers: 1
• Number Of Transmitters: 2
• Wireless Frequency: 433 MHz to 915 MHz
• Output Power: + 7 dBm
• Operating Supply Voltage: 2.5 V, 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Modulation: FHSS, FSK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 579-MRF49XA-1/ST

FIGURE 3-16:
FIGURE 3-17:
© 2009 Microchip Technology Inc.
SDI
CS
SDO
(Register interrupt in TX mode*)
SCK
* The device is in Transmit (TX) mode when the RXCEN bit is cleared using the PMCREG.
Note 1: Ttx_xtal_on is the start-up time of PLL + PA with a running crystal oscillator.
Transmit Register Write
(CS, SCK, SDI)
Commands
Enabling the transmitter preloads the TX latch with
2: SDO is a tri-state of CS.
TX Data
TXCEN
SPI
SDO
IRO
(2)
Synthesizer/PA
TX REGISTER USAGE
MULTIPLE BYTE WRITE WITH TRANSMIT REGISTER
Enable
0xAAAA
TXDEN = 1
GENCREG
T
tx_xtal_on
TXCEN = 1
PMCREG
Synt.
TX BYTE 1
(1)
Preliminary
0xAA
PA
TX Byte 1
TX Latch
Do not switch the TXCEN off here, because the TX
Byte 1 is not transmitted out, it is only stored in the
0xAA
TX Latch
TX Byte
Dummy
TX Byte1
internal register
TX BYTE 2
TXCEN = 0
PMCREG
Fraction of the dummy byte
MRF49XA
GENCREG
TXDEN = 0
TX BYTE n
DS70590B-page 67